Roughly translated: "May I help you?" One response is "could I have a Guinness, please." There is no rude connotation in the phrase.
In a late club, "Y'alright, lads, please" means it's time to clear out.

Arsewise

Ass-backwards

Ask me bollocks

Bullshit

"If you want to know the answer, you'll have to question my testicles"  either Podge or Rodge.